Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 36, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 7, 1997, 4:31 PM MST for Yavapai County, Arizona. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 7, 1997, 4:31 PM MST (23:31 UTC)
- Expired
- Aug 7, 1997, 5:00 PM MST
- In force
- 29 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 23:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.5 hours before the alert went out and 98 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 11 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 2202 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFLG 072331 RRA SVRFLG AZC025-080000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 431 PM MST THU AUG 7 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL ARIZONA ...EXTREME SOUTHWESTERN YAVAPAI COUNTY AT 427 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF DOPPLER RADAR 11 MILES WEST SOUTHWEST OF CONGRESS MOVING SOUTHWEST AT 10 MPH...ALONG STATE HIGHWAY 71. PEOPLE NEAR OR IN THE PATH OF THIS SEVERE STORM SHOULD FIND SHELTER IMMEDIATELY! IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A STRONG BUILDING AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. SEVERE THUNDERSTORMS PRODUCE LARGE HAIL...VERY HEAVY RAIN...DAMAGING WIND...AND FREQUENT LIGHTNING.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 2:30 PM MST, 2 hours 1 minute earlier.
Area forecast discussion, Aug 7, 2:30 PM MST, 2 hours 1 minute before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST THU AUG 07 1997 TSTMS FIRING OVER YAVAPAI COUNTY AS THESE AREAS FINALLY REACHED CONVECTIVE TEMP WITH ENUF LOW LVL MOISTURE...PRETTY MUCH AS EXPECTED THO A HOUR OR SO EARLY. BLV DVGNC ALOFT ONE OF THE REASONS ITS FIRING HERE...MORE SO THAN ERN RIM AND WHITE MTNS. TSTMS SHOULD DSPT AFTER SUNSET...THO HAIL WILL APPROACH SVR SIZE WITH A FEW BARELY REACHING SVR CRITERIA LATE THIS AFTN. NEXT TWO DAYS DONT LOOK PARTICULARLY INTERESTING...THO WILL HAVE TO WATCH LOW LVL MSTR SEEPING IN FROM S AND W ALONG WRN AZ BORDER. WITH RDG PROJECTED TO SHIFT SLOWLY SE...DOOR MAY BE OPENED FOR THIS MSTR TO SPREAD FURTHER EAST. IS ENUF TO INTRODUCE SLGT CHC FOR TSTMS OVER THE HILLS FRI AND SAT. FLG0112 INW0001 CUOCO FLG...NONE
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:17 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 33 min |
| Aug 7, 2:53 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 min |
| Aug 7, 3:21 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 34 min |
| Aug 7, 3:55 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 35 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.